That's according to Networked Insights, which found that brands especially are subject to having their hashtags hijacked for unrelated use.It's no secret that huge brands use Twitter as the world's biggest focus group. Companies keep their ears pressed up against the wall via social media, determined to suss out what their customers think of them. It's also no secret that social media data is full of "noise"—messy, useless, irrelevant data. Now, a new study finds that much of that "noise" is generated by links to coupon sites and celebrity retweets...
